hydrangea in pot. 2nd year. flowers dying and turning a dirty light blue.

Asked July 27, 2020, 1:06 AM EDT

how often to water and fertilize. do i trim the faded flowers?

Benton County Oregon

1 Response

Hello there. Hydrangea prefer moist well drained soil. There are many types of hydrangea. Since you did not specify the kind of plant I will answer as if yours is the most typical kind found in Oregon gardens that has large “mophead” type blooms or one with smaller flatter heads of sterile blooms surrounding a center part of the flower head with smaller fertile flowers. Both are Hydrangea macrophllya. This type of hydrangea also has remontant or reblooming varieties. Your plant may need to have the soil in its pot refreshed, it may have outgrown its pot, OR it may need to be watered more often. You can trim off the dead blooms for aesthetics. If the roots of the plant are up against the side of the pot you need to repot to a larger container. If the soil has compacted or lot has washed out of the pot over time you probably need to repot with fresh potting mix. One university site I visited said to prune off the old blooms of plants up to about 3 years in age once the flowers turn brown, adding to remove them just above the next set of leaves. For a plant in a pot you may have to water everyday during this hot spell. You need to check the soil in the pot for dryness and watch for signs of your plant wilting. Hydrangea that repeatedly wilt may not bloom as prolifically next season. I am including a link for an OSU publication that discusses care of hydrangeas. This document discusses when and how to fertilize your plant and general hydrangea care. https://extension.oregonstate.edu/gardening/flowers-shrubs-trees/general-care-hydrangeas Happy Gardening.